Ophthalmology COA Exam Terms 100% Correct

Ophthalmology COA Exam Terms 100% Correct "against motion" The retinoscopic reflex movement that is in the opposite direction from the movement of the streak of light from the retinoscope; typical of the myopic eye "with motion" The retinoscopic reflex movement that is in the same direction as the movement of the streak of light from a retinoscope; typical of the hyperopic eye. 15-hue test A test that can identify color vision deficits by asking the patient to arrange 15 pastel-colored chips of similar brightness but subtly diferent hues in a related color sequence. Also called Farnsworth-Munsell D-15 test A-mode ultrasonography or A-Scan ultrasonography A diagnostic procedure in which sound waves traveling in a staight line are used to reveal the position of, and distances between, structures with the eye and orbit. This techhnology helps to determine the power selection of an intraocular lens abduction the movement of the eye outward toward the temple. aberrometry The measurement of optical aberrations of the visual system using a device called a wavefront ananlyzer or an aberrometer abrasion a scratch abscess a localized collection of pus surrounded by inflamed tissue. absolute scotoma a severe visual field defect in which the largest and brightest stimulus cannot be seen; blindness at that specific location accommodation The change in the curvature of the crystalline lens that helps to focus images of objects close to the eye acidic burns a chemical injury to tissue, caused by an agent of low pH acquired immuno-deficiency syndrome AIDS An infection with human immunodeficiency virus (HIV) that causes a compromised immune system acute Refers to a condition that flares up suddenly and persists for only a short time. add The portion of the multifocal lens (usually the lower part) that provides correction for near vision. also called segment or near add adduction The movement of the eye inward toward the nose adenovirus A family of viruses involved primarily in respiratory infections; can cause hightly contagious forms of conjunctivitis adnexa The tissues and structures surrounding the eye; includes the orbit, extraocular muscles, eyelids, and lacrimal apparatus afferent pupillary defect APD A pupil with normal iris function that fails to constrict normally with direct light stimulation, but reacts strongly consensually, or when the fellow eye is stimulated. Usually secondary to optic nerve disease. age-related macular degeneration ARMD